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//---------------------------------------------------------------------------
//
// <copyright file="Geometry3D.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//
// History:
// 6/10/2004 : Microsoft - Created
//
//---------------------------------------------------------------------------
using MS.Internal.Media3D;
using System;
using System.Diagnostics;
using System.Windows.Media.Animation;
using System.Windows.Media.Composition;
namespace System.Windows.Media.Media3D
{
/// <summary>
/// This is the base class for all 3D geometry classes. A geometry has
/// bounds and can be rendered with a GeometryModel3D.
/// </summary>
[Localizability(LocalizationCategory.None, Readability = Readability.Unreadable)] // cannot be read & localized as string
public abstract partial class Geometry3D : Animatable, DUCE.IResource
{
//------------------------------------------------------
//
// Constructors
//
//------------------------------------------------------
#region Constructors
// Prevent 3rd parties from extending this abstract base class.
internal Geometry3D() {}
#endregion Constructors
//------------------------------------------------------
//
// Public Methods
//
//------------------------------------------------------
#region Public Methods
/// <summary>
/// Gets bounds for this Geometry3D.
/// </summary>
public abstract Rect3D Bounds { get; }
#endregion Public Methods
//------------------------------------------------------
//
// Public Properties
//
//------------------------------------------------------
//------------------------------------------------------
//
// Public Events
//
//------------------------------------------------------
//------------------------------------------------------
//
// Internal Methods
//
//------------------------------------------------------
#region Internal Methods
// NOTE: Geometry3D hit testing takes the rayParams in the outer space of the
// Geometry3D. That is, RayHitTest() will apply this geometry's
// transform to the ray for the caller.
//
// This is different than Visual hit testing which does not transform
// the hit testing parameters by the Visual's transform.
internal void RayHitTest(RayHitTestParameters rayParams, FaceType facesToHit)
{
Debug.Assert(facesToHit != FaceType.None,
"Caller should make sure we're trying to hit something");
Rect3D bounds = Bounds;
if (bounds.IsEmpty)
{
return;
}
//
Point3D origin;
Vector3D direction;
rayParams.GetLocalLine(out origin, out direction);
if (LineUtil.ComputeLineBoxIntersection(ref origin, ref direction, ref bounds, rayParams.IsRay))
{
RayHitTestCore(rayParams, facesToHit);
}
//
}
internal abstract void RayHitTestCore(RayHitTestParameters rayParams, FaceType hitTestableFaces);
#endregion Internal Methods
}
}
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